Jay Maity
Harmless
Posts: 7
Registered: 22-12-2003
Member Is Offline
Mood: need informatio
|
|
Interesting Reactions
Can anyone tell me some interesting reactions, which can be viewable to public.
It must not be so much costly.
Edit: Title made more legible. Chemoleo
[Edited on 22-8-2004 by chemoleo]
|
|
|
Hang-Man
Hazard to Self
Posts: 70
Registered: 16-1-2004
Location: Canada
Member Is Offline
Mood: Wasted
|
|
I’ve got a great one. First you isolate fluorine (piece of cake, google it) then you buy about 200 grams of francium metal, (ask at the pharmacy,
they will order it for you). Then you just drop the chunk of francium into the flask with the fluorine gas. It’s a real show stopper.
|
|
|
BromicAcid
International Hazard
Posts: 3227
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
So you're looking for a demonstration basically:
Putting a few drops of mercury on a large block of aluminum and exposing it to the atmosphere supposedly will turn the whole mass to powder in a
somewhat short time, always thought that sounded interesting.
Spontaneous combustion of white phosphorus would be a neat but obtaining the phosphorus, although cheap if you have a legal source, is quite
difficult.
The oscillating iodine clock reaction is a classic demo, more information can be found, but it calls for somewhat more exotic reagents.
Burning a magnesium strip is a good way to get attention, pass out sun glasses beforehand.
Thermite reactions, reacting sodium with water, reaction of sulfur with iron filings, burning alcohol mixed with barium/strontium/lithium salts.
I've seen many many demos and there are literally as many as people can think of. There is a book floating around somewhere named "Classic
Chemistry Demonstrations: One Hundred Tried and Tested Experiments" that looks like it would be quite interesting.
More chemistry demos
|
|
|
JohnWW
International Hazard
Posts: 2849
Registered: 27-7-2004
Location: New Zealand
Member Is Offline
Mood: No Mood
|
|
The longest-lived isotopes of francium have half-lives of only 19 and 21 minutes! Francium (atomic number 87) is, in fact, the least stable element
with atomic number below about 100.
John W.
|
|
|
chemoleo
Biochemicus Energeticus
Posts: 3005
Registered: 23-7-2003
Location: England Germany
Member Is Offline
Mood: crystalline
|
|
JohnWW - just in case u haven't figured - he was taking the piss.
You are turning into a walking dictionary! 
Never Stop to Begin, and Never Begin to Stop...
Tolerance is good. But not with the intolerant! (Wilhelm Busch)
|
|
|
The_Davster
A pnictogen
Posts: 2861
Registered: 18-11-2003
Member Is Offline
Mood: .
|
|
There is also sugar in conc. sulfuric acid, ammonia fountain, and NI3.
I have a book around here somewhere called "chemical magic" that has a lot of demonstration type chemical reactions. If I can find it I can
contribute a lot more ideas.
|
|
|
Blind Angel
National Hazard
Posts: 845
Registered: 24-11-2002
Location: Québec
Member Is Offline
Mood: Meh!
|
|
Why not the Mercury heart, put a drop of mercury into a saline solution (google for the precise one) and touch it with a needle, it'll beat like
a heart.
/}/_//|//) /-\\/|//¬/=/_
My PGP Key Fingerprint: D4EA A609 55E4 7ADD 8529 359D D6E2 33F6 4C76 78ED |
|
|
guy
National Hazard
Posts: 982
Registered: 14-4-2004
Location: California, USA
Member Is Offline
Mood: Catalytic!
|
|
There's always pyrotechnic experiments like KMnO4 + glycerine (brake fluid works well too)
|
|
|
JustMe
Hazard to Others
Posts: 111
Registered: 7-8-2003
Member Is Offline
Mood: No Mood
|
|
Not so cheap (but not bad)... you'll need some silver nitrate, distilled water and a copper strip. Dissolve the silver nitrate in the distilled
water (it doesn't need to be concentrated), and shape the copper strip into an ever widening spiral. Drop into the solution. Immediately the
copper displaces the silver, and over a period of hours you'll get what looks like a silvery christmas tree with silver stalactites hanging off
of the copper.
Cheap and impressive (not in a pyrotechnic way): Create Instant Rust® 
Mix equal amounts of normal chlorine bleach and vinegar (oh, say about 6 ounces or so of each), and add steel wool. It crumbles to rust in seconds.
|
|
|
neutrino
International Hazard
Posts: 1583
Registered: 20-8-2004
Location: USA
Member Is Offline
Mood: oscillating
|
|
I'd suggest playing with acids and bases in indicator solutions. Take your indicator (universal indicator or homemade red cabbage should do
nicely) and add it to a big beaker of water that is being stirred w/a magnetic stirrer. Add some Mg(OH)<sub>2</sub>. Add a small amount of
acid and it will go acidic for a second, then go back to basic (this is due to the limited solubility of Mg<sub>2</sub> . Add more acid until it becomes acidic and note how it goes clear at this point.
|
|
|
DDTea
National Hazard
Posts: 940
Registered: 25-2-2003
Location: Freedomland
Member Is Offline
Mood: Degenerate
|
|
My General Chemistry teacher loved to do little demonstrations, especially on the first day of school to boggle our little minds...usually, they
involved phenolthalien (I hope I spelled that properly).
In one case, she wrote "Welcome to Chemistry!" on a few pieces of coffee filter (one filter per letter) with phenolthalien. Then as the
class came in and took seats, before she said anything, she sprayed each coffee filter with the Windex and turned the phenolthalien letters a deep red
for all to see .
She did a spoof on a titration in another demonstration, claiming to turn "water into wine!" The poor students were so boggled that one
asked, "Can you drink it???" Well as the case may be, perhaps you could--if you felt like evacuating your bowels  .
I miss that chemistry teacher 
"In the end the proud scientist or philosopher who cannot be bothered to make his thought accessible has no choice but to retire to the heights in
which dwell the Great Misunderstood and the Great Ignored, there to rail in Olympic superiority at the folly of mankind." - Reginald Kapp.
|
|
|
I am a fish
undersea enforcer
Posts: 600
Registered: 16-1-2003
Location: Bath, United Kingdom
Member Is Offline
Mood: Ichthyoidal
|
|
Some of my favourite reactions involve creating extremely intensely coloured compounds from colourless or weakly coloured reagents.
Examples include:
Copper(II) Sulphate + Ethylene Diamine (Deep Purple)
Iron(III) Chloride + Sodium Thiocyanate (Blood Red)
Iron(II) Sulphate + Potassium Ferricyanide (Navy Blue)
Benzenediazonium Chloride + Phenol (Bright Yellow)
1f `/0u (4|\\| |234d 7|-|15, `/0u |234||`/ |\\|33d 70 937 0u7 /\\/\\0|23.
|
|
|
MadHatter
International Hazard
Posts: 1332
Registered: 9-7-2004
Location: Maine
Member Is Offline
Mood: Enjoying retirement
|
|
Armstrong's Mixture
My chemistry teacher demonstrated the dangers of mixing certain
compounds together and whacking them with a hammer. KClO3 and red P
in this case on an anvil. Unfortunately, I blew my eyebrows off later
with this same mixture(stole it from the Chem Lab). Never mixed those
2 together again !
From opening of NCIS New Orleans - It goes a BOOM ! BOOM ! BOOM ! MUHAHAHAHAHAHAHA !
|
|
|
DDTea
National Hazard
Posts: 940
Registered: 25-2-2003
Location: Freedomland
Member Is Offline
Mood: Degenerate
|
|
MadHatter just reminded me of a lab I did with the same chemistry teacher I mentioned earlier...
Basically, we prepared Hydrogen and Oxygen gases in separate syringes (not difficult to do). We then attached tubing to the syringes, with the
other end of each tube in some dish detergent in a syringe. We then made a bubble of a Hydrogen/Oxygen 2/1 mixture, and lit the bubble with a match.
Needless to say, we got a loud "POP" and some of the petri dishes broke while others were thrown across the classroom. Crazy teacher she
was
On another note, I remember waaaayyy back in like third grade or so, some chemists came in to entertain us with some demonstration experiments. The
one I remember most was where they took a bunch of those monkeys-in-a-barrel (you know, the little red plastic monkeys whose arms are shaped such that
they can be linked together and form chains?) and put them in their barrel...then shook the little barrel up and pulled them out--all linked in one
long chain. I have no idea how that was done, and it boggled our little audience.
[Edited on 8-24-04 by Samosa]
"In the end the proud scientist or philosopher who cannot be bothered to make his thought accessible has no choice but to retire to the heights in
which dwell the Great Misunderstood and the Great Ignored, there to rail in Olympic superiority at the folly of mankind." - Reginald Kapp.
|
|
|
MadHatter
International Hazard
Posts: 1332
Registered: 9-7-2004
Location: Maine
Member Is Offline
Mood: Enjoying retirement
|
|
The Fun Days !
MrSamosa, I too remember the fun days of chemistry in school.
I'm prettty sure that some of my instructors were as crazy if
not crazier than I am ! I LOVED THEM ! That was my kind
of instructor - not worried about a punk's parents' lawsuit because
his/her hands got stained with a common dye used in biology !
And in the early to mid 70's - not afraid to demonstrate an explosive !
Some of today's teachers are pussies in contrast !
To the good old days: MUHAHAHAHAHAHA!
[Edited on 25-8-2004 by MadHatter]
From opening of NCIS New Orleans - It goes a BOOM ! BOOM ! BOOM ! MUHAHAHAHAHAHAHA !
|
|
|
true_alchemy
Harmless
Posts: 21
Registered: 29-9-2004
Member Is Offline
Mood: No Mood
|
|
I got a couple of neat ones. The deep yellow lead iodide precipitate is quite awesome. (PbNO3 in water + Na or KI in water
small peices of calcium carbide added to HCl and bleach ignites spontaneously. (I did that as a cub scout- starting a fire without matches-hehe)
The flame color of LiCl is breathtaking!
|
|
|
tom haggen
Hazard to Others
Posts: 488
Registered: 29-11-2003
Location: PNW
Member Is Offline
Mood: a better mood
|
|
Alkali metals and H2O react quite nicely. Also, you might try mixing NaOH with nitromethane. Good luck
N/A
|
|
|
Andy B
Harmless
Posts: 2
Registered: 18-10-2004
Member Is Offline
Mood: No Mood
|
|
try hydrogen peroxide decomposition, use potassium iodide as a catalyst and have some fairy liquid to form bubbles.
Have a bottle/bowl full of H2O2 and have a layer of detergent on top.. add the catalyst and hey presto: Orange-y brown-y foam!
|
|
|
froot
Hazard to Others
Posts: 347
Registered: 23-10-2003
Location: South Africa
Member Is Offline
Mood: refluxed
|
|
Aaah those good old days.
Our science teacher decided it was time to dispose of a whole jar of old suspect looking potassium metal in kerosine. She dragged us up to the
school's swimming pool and gave everyone a turn to fling a large block of K into the pool with forceps. Those explosions still haunt me.
The pool was a little off colour for the next week leaving the caretaker a little bewildered .
Another neat trick she did was melting KCLO3 in a testube and dropped in a splinter of wood which immediately incinerated itself.
[Edited on 18-10-2004 by froot]
We salute the improvement of the human genome by honoring those who remove themselves from it.
Of necessity, this honor is generally bestowed posthumously. - www.darwinawards.com |
|
|
neutrino
International Hazard
Posts: 1583
Registered: 20-8-2004
Location: USA
Member Is Offline
Mood: oscillating
|
|
Add styrofoam packing peanuts to 30% H<sub>2</sub>O<sub>2</sub>. The styrofoam is destroyed as soon as it hits the peroxide.
|
|
|
Hermes_Trismegistus
National Hazard
Posts: 602
Registered: 27-11-2003
Location: Greece, Ancient
Member Is Offline
Mood: conformation:ga
|
|
precipitation reactions look pretty neat.
Like KI (aq) and Pb(NO3)2....two clear solutions that turn bright yellow and opaque when mixed. It's also cheap like borscht.
Adding a strip of copper metal to nitric acid is pretty neat too, clear acid...copper metal....to green liquid and red fumes (need some ventilation
though)
Arguing on the internet is like running in the special olympics; even if you win: you\'re still retarded.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
